Method of Grounding a Perforating Gun Assembly

A method of grounding a perforating gun assembly, comprising:

• providing a perforating gun assembly, wherein the perforating gun assembly comprises:
• a gun barrel housing having a first end, a second end opposite the first end, and a bore extending from the first end to the second end of the gun barrel housing;
• an explosive charge holder having at least one receptacle, wherein each receptacle is configured to receive an explosive charge;
• and
• a detonator;
• threadedly connecting a tandem sub to the gun barrel housing at the second end of the gun barrel housing, wherein the tandem sub comprises:
• a steel body having a first end, and a second end opposite the first end;
• and
• an internal bore within the steel body extending from the first end to the second end, and a tapered shoulder residing along the internal bore proximate the second end, with the tapered shoulder defining an angle relative to a central axis of the internal bore;
• providing a bearing member along the tapered shoulder of the internal bore of the tubular sub, wherein the bearing member comprises:
• a plurality of roller bearings;
• and
• a bearing housing supporting the plurality of roller bearings, serving as a cage;
• operatively connecting the bearing member to the explosive charge holder;
• placing an electrically conductive ground member within or abutting the bearing member;
• and
• placing the bearing member in contact with the tapered shoulder of the internal bore of the tandem sub such that the bearing member is electrically grounded with the steel body of the tandem sub.

A method of grounding a wellbore tool, wherein the wellbore tool comprises a tubular body having a first end, a second end opposite the first end, and an internal bore extending from the first end to the second end, and the method comprising:

• threadedly connecting a first sub to the first end of the tubular body;
• threadedly connecting a second sub to the second end of the tubular body;
• placing a first bearing member against a first tapered shoulder within the first sub;
• placing a second bearing member against a second tapered shoulder within the second sub;
• and
• placing the first bearing member, the second bearing member, or both in electrical communication with a grounding wire within a wellbore;
• and
• placing the first bearing member and the second bearing member in electrical communication.